1. İstanbul Medeniyet University Faculty of Medicine, Department of Anaesthesiology and Reanimation, İstanbul, Turkey
2. Bezmialem Vakıf University Faculty of Medicine, Department of Anaesthesiology and Reanimation, İstanbul, Turkey
3. University of Health Sciences Turkey, Sultan Abdülhamid Han Training and Research Hospital, Clinic of Anaesthesiology and Reanimation, İstanbul, Turkey
4. Van Training and Research Hospital, Clinic of Gastroenterology, Van, Turkey